Niemczyk, R. Boonpornprasert, P. Chen, Y. Good, J.D. Groß, M. Hillert, W. Huck, H. Isaev, I.I. Kalantaryan, D.K. Koschitzki, C. Krasilnikov, M. Li, X. Lishilin, O. Loisch, G. Melkumyan, D. Oppelt, A. Qian, H.J. Renier, Y. Saisa-ard, C. Stephan, F. Zhao, Q.T. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-TUPO098 English 553-556 TUPO098 emittance electron FEL laser space-charge Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-TUPO098 http://jacow.org/linac2018/papers/tupo098.pdf Transverse slice emittance is one of the most important properties of high-brightness electron beams for freeelectron lasers (FELs). The photo injector test facility at DESY in Zeuthen (PITZ) develops high-brightness electron sources for modern FELs. With a 23 MeV, 1 nC beam at PITZ the experimental slice emittance characterization with the quadrupole scan technique is complicated by strong space charge effects. Combining the slit scan technique with a transverse deflecting cavity (TDS) allows for timeresolved emittance measurements of such a space-chargedominated beam. The first proof-of-principle results of slice emittance measurements at PITZ based on the ’TDS + slit scan’-technique are presented in this paper.